CN105980166B

CN105980166B - The electric brake structure of castor

Info

Publication number: CN105980166B
Application number: CN201480074518.8A
Authority: CN
Inventors: 饭山范之; 北侑也
Original assignee: NANSHIN CO Ltd
Current assignee: NANSHIN CO Ltd
Priority date: 2013-11-29
Filing date: 2014-07-15
Publication date: 2018-04-10
Anticipated expiration: 2034-07-15
Also published as: WO2015079735A1; WO2015079584A1; US20170008340A1; CN105980166A; US10046599B2

Abstract

The present invention relates to the electric brake structure of the castor for the brake that can reliably carry out castor.Characterized in that, it is provided with such as lower part：Switch, the switch is equipped with the object of castor, to brake gear output indication signal；Detection, detection is arranged at the rotary shaft of the cam, and is accordingly configured with each position of multiple cam surfaces；Sensor, the sensor detect each cam surface with acting docking for axle using detection；Motor, the motor rotate according to the input of the switch, stop when sensor detects the position of defined cam surface；And gear train, the gear train pass to the rotation of the motor rotary shaft of the cam.

Description

The electric brake structure of castor

Technical field

The present invention relates to the electric brake structure of the castor for the brake control that can reliably carry out castor.

Background technology

In the past, such as in the castor for possessing magnet coil operation type braking mechanism of Japanese Unexamined Patent Publication 2001-58503, Disclose following structure：The trunnion axis is rotatably supported in foot wheel carrier, at the trunnion axis both ends of the foot wheel carrier A pair of castor runners and by carrying out excitation to magnet coil and relative to the plunger of the foot wheel carrier motion of retreating, in institute State foot wheel carrier and the hook to be linked with the plunger is set, and set and the hook in the foot wheel carrier side of the castor runner Engaging and the holding section departed from, by carrying out switching manipulation to the switch for being arranged on such as handrail of standing auxiliary chair, to institute State magnet coil and carry out excitation, make plunger upward and downward.

In addition, in Japanese Unexamined Patent Publication 2012-210237 indoor moving yourself kit, following structure is disclosed：Set The load of the with good grounds prescribed limit detected by load sensor and the braking mechanism to be braked to castor, the braking mechanism The motor that can be rotated and reverse for possessing the installation portion for being disposed in castor, the worm gear driven by the motor, by the worm-gear driven Hold, the castor rotary shaft that is driven by the hold stop gear and castor wheel stop arm and as taking into account the pin Take turns the spring of the anti-interference mechanism of the action of rotary shaft stopping gear and castor wheel stop arm.

These above-mentioned castors can omit the pedal or pull bar used in the brake operation of conventional castor, therefore, Even if in the case of being equipped with the objects such as the bed, chair, desk of castor and being arranged on narrow place, switch on hand is utilized Or load sensor can just carry out brake operation, therefore brake operation is easily carried out.

But be magnet coil is worked using the closed and disconnected of switch among the former, detected among the latter The load of the seating face of portions is applied to carry out brake operation, therefore has following problem：In the presence of the event due to braking mechanism Barrier etc. and can not carry out brake control situation or can not confirm to carry out the situation of incomplete brake.

In addition, in Japanese Unexamined Patent Application Publication 2004-516991, following structure is disclosed：A kind of roller, especially castor type Roller, the spinning movement of running vehicle wheel and the revolution action of running vehicle wheel can be fixed, possess the control cam of insertion roller Axle is acted, in order to drive the action axle, electro-motor is acted on the action axle via gear mechanism, in the roller, institute Electro-motor is stated via toothed gear mechanism, the action axle is acted on using electro-motor axle.

In above-mentioned castor type roller, because electro-motor is connected with the coil portion of motor in series, so not only to one Individual direction, which extends, must be grown and form obstruction, and its sleeve can not be installed on generally by the roller for possessing the castor type of electro-motor Tubular installation portion, it is necessary to be installed on the base of carrier via adapter, it is impossible to the pin for possessing electro-motor is used alone The roller of wheel-type, it is additionally present of the shortcomings that electro-motor is longlyer prominent laterally.

Citation

Patent document

Patent document 1:Japanese Unexamined Patent Publication 2001-58503 publications

Patent document 2:Japanese Unexamined Patent Publication 2012-210237 publications

Patent document 3:Japanese Unexamined Patent Application Publication 2004-516991 publications

The content of the invention

The invention problem to be solved

The invention solves problem be to provide the electric brake structure of castor a kind of, it detects the system of castor with sensor The position of dynamic and brake release cam surface, can reliably carry out the control of brake gear, can either used aloned also can It is applied in combination, and it is compact-sized.

Means for solving the problems

The present invention possesses sleeve, cam, cam surface, action axle and brake gear, and the sleeve, which erects, to be arranged to wheel On the bearing support for carrying out pivotal support, the cam is built in the top of the sleeve, and is rotated using rotary shaft, described Cam surface formed in the assigned position of the outer peripheral face of the cam it is multiple, for braking and locking and latch-release, the action axle Docked with the cam surface and displacement, the displacement of the brake gear and the action axle are braked and made to wheel in linkage Dynamic to release, the electric brake structure of the castor is characterised by, is provided with switch, detection, sensor, motor and gear Group, the switch are equipped with the object of castor, and are set to brake gear output indication signal, detection In the rotary shaft of the cam, accordingly configured with each position of multiple cam surfaces, the sensor is each using detection son detection Cam surface docks with action axle, and the motor rotates according to the input of the switch, and as defined in detecting in sensor Stop during the position of cam surface, the gear train passes to the rotation of the motor rotary shaft of the cam, and storage is The containing box for stating motor is fixed on an end of the gearbox for being accommodated with the gear train, horse in a manner of configuring at a right angle The rotary shaft of the output shaft reached and the gear of the front end of the input side as gear train links, after the outlet side of gear train The rotary shaft of the gear at end extends along the rotary shaft identical direction with the input side and turns into the rotary shaft of cam, Huo Zheyu The rotary shaft of cam integratedly links, and is provided with web, and the cardinal extremity of the web is fixed on the gearbox or containing box Bottom surface or upper surface, the front end of the web is by fixing peace by the hole for being arranged at front is chimeric with the sleeve of castor Dress.

Here, the term of braking and locking includes the braking for the narrow sense for stopping the rotation of wheel and the revolution limit of bearing support The control of system.

The effect of invention

In the present invention, existing castor can not be changed and setting height(from bottom) is changed, and can be installed individually In the castor installation portion of conventional tubular, therefore, it is possible to only be braked with a castor, in addition if link gear is set Multiple castors can be braked simultaneously, there is this versatility, and because the containing box of gearbox and motor is matched somebody with somebody with L shapes Put, squarely configured so can be surrounded all the time centered on the sleeve of castor, therefore, when in use, will not turn into and hinder, energy The electric brake structure of castor in compact set is enough provided.

In addition, the containing box of above-mentioned gearbox and motor is fixed on speed change by being fixed on the web of the cardinal extremity of sleeve The containing box of case or motor, accordingly, with respect to castor, centered on sleeve, gear-box and motor can be installed with any direction Containing box, when in use will not turn into hinder.

In addition, by setting detection sensor in gearbox, it is arranged at so as to detect on the gear of driving Detection, can make the displacement of cam accurate.

In addition, torque limiter is set by being intervened in gear train, so as to realize the raising of security.

In addition, loop is timely locked by additional, even if so as to which user forgets to lock, also can be automatic after a certain time Locking, the situation of locking can be forgotten in fact elimination.

Brief description of the drawings

Fig. 1 is the stereogram from a direction of the castor with electric brake structure.

Fig. 2 is the stereogram from another direction of the castor with electric brake structure.

Fig. 3 is the top view of the castor with electric brake structure.

Fig. 4 is the back side and the block diagram of the castor with electric brake structure.

Fig. 5 is the stereogram of gear drive.

Fig. 6 (a) is the figure for representing the gear train in the gearbox under revolution limitation and on-position.

Fig. 6 (b) is the side view for the brake gear for representing revolution limitation and the castor under on-position.

Fig. 7 (a) is the figure for representing the gear train in the gearbox under revolution restriction state.

Fig. 7 (b) is the side view for the brake gear for representing the castor under revolution restriction state.

Fig. 8 (a) is the figure for representing the gear train in the gearbox under test section of the latch-release state.

Fig. 8 (b) is the side view for the brake gear for representing the castor under test section of the latch-release state.

Fig. 9 is the sectional view of castor.

Figure 10 is the schematic diagram in the handle setting switch for the object for possessing castor.

Figure 11 is the side view of different embodiments.

From (a) to (d) is to represent that web is fixed on to each different of the situation of the containing box of motor matches somebody with somebody in Figure 12 The top view put.

Figure 13 (a) is the top view of gearbox, containing box and web.

Figure 13 (b) is the side view of gearbox, containing box and web.

Figure 13 (c) is the figure for the plane and side for representing torque limiter.

Embodiment

The present invention is provided with such as lower part：Switch, the switch is equipped with the object of castor, to brake gear Output indication signal；Detection, detection are arranged at the rotary shaft of the cam, and corresponding with each position of multiple cam surfaces Ground configures；Sensor, the sensor detect each cam surface with acting docking for axle using detection；Motor, the motor according to The input of the switch and rotate, when sensor detect as defined in cam surface position when stop；And gear train, the gear Group passes to the rotation of the motor rotary shaft of the cam, and the present invention is able to confirm that the position of cam surface and controls brake Device.

Embodiment 1

Fig. 1 and 2 is the embodiment of the castor of the present invention, is the solid in the state of being had an X-rayed to the gear in gearbox Figure.

As shown in Fig. 6 (b)~Fig. 8 (b), the castor 1 possesses：Sleeve 3, the sleeve 3 are erected on supporting via bearing portion B On frame 5, the bearing support 5 carries out pivotal support to wheel 2；Cam 10, the cam 10 are built in the top of the sleeve 3, utilize Rotary shaft 11 is rotated；The predetermined bits of cam surface 10a~10c, cam surface 10a~10c in the outer peripheral face of the cam 10 Put to be formed it is multiple, for brake and brake release；Axle 4 is acted, the action axle 4 docks and position with the cam surface 10a~10c Move；And brake gear, the displacement of the brake gear and the action axle 4 carry out braking and locking and locking to wheel 2 in linkage Release.

In addition, the rotary shaft 11 is formed by the axle that section is polygon (being hexagon in illustrated example midship section), via The hole 11a of the identical section shape at center of the hole of sleeve 3 with being formed at cam 10 is chimeric and installs.

On the other hand, on the object 50 (for example, bed, wheelchair, desk etc.) of castor 1 is equipped with, oriented brake is set The switch 30 of device output indication signal.

That is, as shown in figure 4, indicating or being locked out revolution limitation instruction, revolution limitation and braking from switch 30 The indication signal and sensor 13a~13c described later detection signal for releasing instruction are inputted to control unit 40, and control unit 40 is based on The signal controls the motor in housing 25.

Next, as long as switch 30 is arranged on the hand held during moving bed as shown in one in such as Figure 10 Handle H grip part, then the braking and locking of castor can be just released by grasping member H, move object.

In addition, as shown in Figure 6 to 8, it is provided with such as lower part：Sub- 12a~12c is detected, the sub- 12a~12c of the detection is set The rotary shaft 11 of the cam 10 is placed in, is accordingly matched somebody with somebody with being arranged at the multiple cam surface 10a~10c each position of cam 10 Put；Sensor 13a~13c, sensor 13a~13c detected using sub- 12a~12c is detected each cam surface 10a~10c with Act the docking of axle 4；Motor, the motor rotate in housing 25 according to the input of the switch 30, and in sensor 13a ~13c stops when detecting the position of defined cam surface；And gear train G, gear train G are by the rotation transmission of the motor Rotary shaft 11 to the cam 10.

In the present embodiment, cam surface is by carrying out turning round the first cam surface 10a of limitation, carrying out turning round limitation and braking Second cam surface 10b and the 3rd cam surface 10c compositions for carrying out latch-release.

In illustrated example, the 3rd cam surface 10c is set in the neutral position in center, and match somebody with somebody at the clockwise direction in figure The second cam surface 10b is put, the first cam surface 10a is configured at the counter clockwise direction in figure.

Also, the sub- 12a~12c of detection for being arranged at rotary shaft 11 is as the corresponding with the first cam surface 10a first detection 12a, the sub- 12b of the second detection corresponding with the second cam surface 10b and the sub- 12c structures of the 3rd detection corresponding with the 3rd cam surface 10c Into sensor is by the sub- 12a of the detection of detection first first sensor 13a, the sub- 12b of the detection of detection second second sensor 13b Formed with the sub- 12c of the detection of detection the 3rd 3rd sensor 13c.

Also, in the present embodiment, detect sub- 12a~12c be fixedly installed on be accommodated in it is convex in gearbox 28 described later In the rotary shaft 11 of wheel 10, sensor 13a~13c is also installed in gearbox 28.

In the present embodiment, the sub- 12a~12c of the detection is by the teat shape that is fixedly installed in the rotary shaft 11 of cam 10 Into detection sensor 13a~13c is formed by being contacted with the teat to detect the limit switch of the position of teat, in the present invention In, other contact-making switches can be both used, non-contact switch can also be used.

In addition, in the present invention, detection can also be disposed on positioning away from the cam surface of cam 10, with setting Sensor in sleeve 3 detects the structure of the position of cam surface.

In illustrated example, gearbox 28 is made up of the box of polygon tubular, via the company for being fixedly installed in the sleeve 3 Knot tying 6 and the housing 25 of the tubular of the containing box as motor are jointly supported by, and carry out pivot branch to the gear train G Support, but in the present invention, as long as pivotal support can be carried out to gear train G, section can also be passage shape or other Arbitrary shape.

Gearbox 28 and sleeve 3 leave as defined in interval and it is relative, one end is fixed on to the company of the wall surface of gearbox 28 The other end of knot tying 6 is fixedly installed in the base end side of sleeve 3.

In addition, on the direction that the bearing of trend with the gearbox 28 intersects, the housing of motor is configured with the side of sleeve 3 25, the front end of housing 25 is fixed on the side wall of gearbox 28 and is supported in neutral position.

Also, due to housing 25 the cam 10 with being protruded from gearbox 28 rotary shaft 11 it is identical towards sleeve 3 Abreast configured with rotary shaft 11 on direction, therefore, the housing 25 of gearbox 28 and motor is pacified centered on sleeve 3 across sleeve The gap configuration of dress is into L-shaped when overlooking, therefore volume is little, will not form obstruction when in use.

In other words, in a manner of turning into right angle by the front end of the housing 25 in the end of a side (front) for gearbox 28 Fixed, the rotary shaft of the output shaft 26 of motor and the action gear G1 of the front end of the input side as gear train G links, as tooth The drive gear G4 of the rear end of wheel group G outlet side rotary shaft is prolonged along the action gear G1 identicals direction with the input side Stretch and link with the rotary shaft 11 of cam, the rotation to the output shaft 26 of motor is slowed down, and is passed to the rotary shaft 11 of cam 10 It is dynamic.

Above-mentioned gearbox 28 and housing 25 are fixed to one another, and the sleeve 3 of castor 1 is fixed on via web 6.

That is, the cardinal extremity of web 6 be fixedly installed in any side in the gearbox 28 or housing 25 bottom surface and/or Upper surface, front end pass through the hole 6a for being arranged at front is chimeric with the sleeve 3 of castor 1 and weld etc. to be fixedly installed in sleeve 3。

As shown in figure 5, the rotary shaft of the output shaft 26 of motor and action gear G1 links.

Action gear G1 is engaged with the first relay gear G2 in big footpath, and first relay gear G2 is coaxially disposed The drive gear G4 of rotary shafts 11 of the second relay gear G3 of path with being installed on cam 10 is engaged, while the rotating speed to motor Slowed down, while strongly to make the rotary shaft 11 of cam 10 be rotated along forward direction and reverse directions.

In addition, in illustrated example, because rotary shaft 11 inserts gear G4 hole, it is also used as gear G4 rotary shaft, and energy It is enough to be chosen out laterally from the fenestra of gearbox 28, therefore in failure etc., rotary shaft 11 is chosen out, by the axle of identical section Inserted from the fenestra, and front end is inserted to the hole 11a of cam 10, thereby, it is possible to manually rotate cam to be braked Control.

In the present invention, structure or the combination of said gear are not limited to, in a word, as long as can by the rotation of motor to The structure that the rotary shaft of cam 10 is driven.

Next, in case of the present embodiment, the brake gear by limitation bearing support revolution revolution limiting unit Formed with the braking parts of the rotation of limiting wheel.

Also, revolution limiting unit by be fixed on action axle 4 bottom rotation stop pan portion 21 and upper and lower a pair of retainers 22,23 Form, upper and lower a pair of retainers 22,23 are engaged when the rotation stop pan portion 21 is displaced to specified altitude position.

In addition, braking parts set two in the present embodiment, a side is disposed on the bottom of the rotation stop pan portion 21 and right The brake shoe 24 that the tyre surface of wheel is pushed, the opposing party is by the arm 14 and lift plate with action axle 4 pivot in linkage 15 are formed, and the lift plate 15 is provided with braking claw 16, and the braking claw 16 is lifted and hung only in shape using the arm 14 Into the convex engaging portion 2a of the lubrication groove in wheel 2.

Also, by the lifting of the action axle 4, to the revolution restriction site (ginseng for only being acted revolution limiting unit According to Fig. 7), make latch-release position (reference picture 8) and limit revolution that revolution limiting unit and braking parts do not play a role The revolution limitation and application position (Fig. 6) displacement that portion and braking parts all play a role.

Therefore, in Fig. 7 (b) revolution limitation, rotation stop pan portion 21 engages with retainer 22, to limit (direction limitation) branch The revolution of bolster 5.

In addition, in Fig. 6 (b) revolution limitation and braking, rotation stop pan portion 21 engages with retainer 23, to limit bearing support 5 revolution.

In illustrated example, brake shoe 24 pushes to the tyre surface of wheel 2, while lift plate 15 is depressed, and brakes claw 16 enter in convex engaging portion 2a recess, to carry out dual braking.

In Fig. 8 (b) latch-release, rotation stop pan portion 21 turn into not with centre position that retainer 22,23 connects and solve Except revolution limits, the tyre surface of brake shoe 24 from wheel 2 leaves, and braking claw 16 is deviate from and solved out of convex engaging portion 2a recess Except braking and locking.

The structure of brake gear in the present invention is not limited to said structure or known braking and revolution limitation Structure.

In addition, in the present embodiment, will brake control be divided into revolution limitation, revolution limitation and braking and latch-release this Three phases are limited but it is also possible to be revolution and the structure in braking and the two stages of latch-release, or locking is solved Except the structure for being further separated into revolution restriction cancellation with turning round limitation and brake release.

In addition, be bearing support without this castor of revolution in the case of or braking and locking and locking solve The structure removed.

Like this, the present invention brake gear in, as long as action axle using cam rotation and slide, brake gear with The displacement of the action axle is acted in linkage, to be locked and latch-release.

In the above-described embodiments, the example of the brake gear of one castor of control is shown, but for example as illustrated in fig. 10, The rotary shaft 11 of cam is extended, if the rotating shaft coaxle of the cam of castor configured along extending direction, can also make two Individual castor carries out brake control in linkage.

In addition, in the present invention, based on the signal, the brake of castor can be monitored on external display (not shown) State, therefore, the state that the user or auxiliary of object (such as hospital bed etc.) can be by monitors to castor Confirm etc..

In the present invention, the detection signal of the cam position based on castor, can be in the additional interior locking mechanism of object 50.

For example, as in Fig. 4 shown in dotted line, control unit 40 passes through to carrying out as defined in the object 50 The actuator 52 that the action and action of structure (such as the lifting for the bed for passing through electronic progress and backrest erect) stop is controlled Control device 51 send the signal signal of motor (as needed control) detected by sensor 13a~13c, so as to The braking state of the brake gear of castor 1 is set to turn into the dynamic of the actuator that the defined action for carrying out object 50 and action stop Make condition, therefore safety device can be used as to play function.

For example, the descending operation of bed can be only carried out in the revolution limitation and braking of castor 1.

In the present embodiment, brake control is automatically carried out by the closure of the switch 30, but can also sets and work as Detect automatically to enter during the halted state of castor and line-locked timely lock structure.

That is, structure can also be appended below：The stopping shape of wheel is detected in the case of the stopping of wheel 2 for being arranged on castor 1 The test section 2s of state, by the way that test section 2s signal is inputed into control unit 40, so as in the input signal of the stopping of wheel 2 In the case of continuing with certain time, braking locking (such as revolution limitation and braking) signal is exported from control unit 40 to motor (reference picture 4).

Alternatively, it is also possible to as illustrated in Figure 10, switch 30 be set on handle H handle, passes through grasping in moving bed Handle H and make switch 30 close when, control unit 40 by cam 10 control latch-release either direction restriction site, work as relieving Switch 30 also separates during handle H, and control unit 40 exports the control being controlled in a manner of being displaced to revolution limitation and application position Signal processed.

In the present invention, the input signal of the closure for switch 30 can also be set, (do not schemed via delay timing loop Show) timely lock function control motor.

That is, closed when by switch 30, it is backward using the delay timing loop-delay regular hour when input signal is output Motor output control signal.

The delay timing loop can both be arranged at 30 sides of switch, can also be arranged at the side of control unit 40.

Thus,, can be certain after it will switch 30 closures such as in the case where making the traveling stopping of object 50 Braking of after-applied castor of time etc. locks, and can reserve more than needed for stop preparing.

Embodiment 2

Different embodiments is represented from Figure 11 to Figure 13.

In the present embodiment, following different embodiment is represented：The front end that the web 6 of sleeve 3 is fixed in one end is fixed In the housing 25 of motor.

Above-mentioned housing 25 can also be cartridge type, but the position that its bottom surface preferably at least makes to be fixed with web 6 is formed as Flat horizontal surface.

Also, supported in this case, gearbox 28 is concatenated plate 6 via the housing 25.

The configuration of the housing 25 and gearbox 28 can also carry out various changes as illustrated in fig. 12.

That is, it is the hole 6a of web 6 is chimeric with sleeve 3, make web 6 with sleeve 3 be that axle is turned round, by by hole 6a Fixed with sleeve 3 with the methods of welding, so as in the side extended with the traveling posture relative to castor 1 to the rear of sleeve 3 In the case that formula is fixed on sleeve 3, housing 25 can abreast be configured at the rear of sleeve 3 and rotary shaft 11, will can become Fast case 28 is configured at left side or right side (reference picture 12 (a) (c)) of sleeve 3.

In addition, web 6 is being fixed on sleeve 3 in a manner of the traveling posture relative to castor 1 is extended forwards In the case of, housing 25 can abreast be configured in the front of sleeve 3 and rotary shaft 11, gearbox 28 can be configured at set The left side of cylinder 3 or right side (reference picture 12 (b) (d)).

Incidentally, in embodiment 1, the position of housing 25 and gearbox 28 is on the contrary, but can also be same with the present embodiment The configuration of four species is selected according to purposes sample.

In addition, in illustrated example, web is extended along the direction orthogonal with housing 25, but can also be with right angle beyond Any angle extend.

In addition, in illustrated example, changed exemplified with the position of gearbox 28 and housing 25 is made with 90 degree of intervals relative to sleeve 3 Become the situation of position, but according to purposes, can also be with angle configurations in addition.

Figure 13 is represented to be fixed on the housing 25 of web 6 and is fixed on the gearbox 28 of the housing 25, in gearbox 28 Gear train G is illustrated with dotted line.

In gear train G, on the gear between the gear being driven to the output shaft 26 of motor and rotary shaft 11 It is provided with the torque limiter T for the connection for blocking gear train G.

Thus, when applying excess load on gear train G, gear train G connection can be blocked, it is very safe.

Known structure can be suitably used in torque limiter T structure.

In addition, in the present embodiment, in the rotary shaft and its extension of the gear that the rotary shaft 11 to cam is driven Divide 11 ' to set and detect sub- 12a~12c, will can respectively detect the detection sensor 13a of the sub- 12a~12c of above-mentioned detection position ~13c is arranged in gearbox 28, and there is no need for the special structure of sensors configured.

The present invention is not limited to above-described embodiment, in addition, naturally it is also possible in the model for the purport for not changing the present invention Enclose the interior various design alterations of progress.

The explanation of reference

1 castor

2 wheels

3 sleeves

4 action axles

5 bearing supports

6 webs

10 cams

10a~10c is braked and the cam surface of brake release

11 rotary shafts

12a~12c detection

13a~13c sensors

The housing of 25 motors

26 output shafts

28 gearboxes

30 switches

40 control units

50 objects

51 control devices

52 actuators

G gear trains

T torque limiters.

Claims

1. a kind of electric brake structure of castor, possess sleeve, cam, cam surface, action axle and brake gear, the sleeve and stand Rise and be arranged on the bearing support that pivotal support is carried out to wheel；The cam is built in the top of the sleeve, and utilizes rotation Axle is rotated；The cam surface formed in the assigned position of the outer peripheral face of the cam it is multiple, for braking and locking and locking Release；The action axle is docked with the cam surface and displacement；The displacement of the brake gear and the action axle is right in linkage Wheel is braked and brake release,

The electric brake structure of the castor is characterised by,

Switch, detection, sensor, motor and gear train, the switch is provided with to be equipped with the object of castor, And to brake gear output indication signal；Detection is arranged at the rotary shaft of the cam, with multiple cam surfaces everybody Put and accordingly configure；The sensor detects each cam surface with acting docking for axle using detection；The motor is according to The input of switch and rotate, and sensor detect as defined in cam surface position when stop；The gear train is by the horse The rotation reached passes to the rotary shaft of the cam,

The containing box for being accommodated with the motor is fixed on the gearbox for being accommodated with the gear train in a manner of configuring at a right angle An end,

The rotary shaft of the output shaft of motor and the gear of the front end of the input side as the gear train links,

Rotary shaft as the gear of the rear end of the outlet side of gear train is prolonged along the rotary shaft identical direction with the input side Stretch and turn into the rotary shaft of cam, or integratedly link with the rotary shaft of cam,

Web is provided with, the cardinal extremity of the web is fixed on the bottom surface or upper surface of the gearbox or containing box, described The front end of web is chimeric with the sleeve of castor and fixed installation by the hole that will be arranged at front.

2. the electric brake structure of castor according to claim 1, it is characterised in that

In the rotary shaft for the gear that the rotary shaft to cam is driven, with each cam surface and the position correspondence docked of action axle Ground is provided with each detection,

The detection sensor for the position for detecting above-mentioned detection is arranged in gearbox.

3. the electric brake structure of castor according to claim 1 or 2, it is characterised in that

Torque limiter is provided with, when excess load puts on the gear train of gear-box, the torque limiter is by gear train Connection block.

4. the electric brake structure of castor according to claim 1, it is characterised in that

Brake gear is made up of the structure for carrying out revolution limitation, double locking and latch-release, and the revolution limitation carries out wheel Direction limitation, the double locking carries out the revolution limitation and braking of wheel, the limitation of the latch-release to wheel Released with braking,

Cam surface has the first cam surface for carrying out turning round limitation, the second cam surface for carrying out double locking and carries out latch-release The 3rd cam surface.

5. the electric brake structure of castor according to claim 1, it is characterised in that

Control unit is provided with, the detection signal of indication signal and sensor to the control unit input switch, and the control Portion processed exports rotation driver signal according to the indication signal of switch to motor output control signal, the control unit to motor, And rotation stop signal is exported to motor according to the detection signal of sensor.

6. the electric brake structure of castor according to claim 1 or 2, it is characterised in that

The test section of the stopping of the wheel of detection castor is provided with, the detection signal of the test section is inputted to control unit, when During the stopping certain time of wheel, the control signal that will carry out the braking and locking of castor exports to motor.

7. the electric brake structure of castor according to claim 1 or 2, it is characterised in that

Control unit is controlled as follows：Switch close during, control unit output castor wheel latch-release or Revolution limitation signal；When separating switch, output revolution limitation and brake signal.

8. the electric brake structure of castor according to claim 1 or 2, it is characterised in that

The indication signal of switch is output via delay timing loop as the indication signal to brake gear.

9. the electric brake structure of castor according to claim 1 or 2, it is characterised in that

The detection signal of sensor is used as the interior locking of object with signal.

10. the electric brake structure of castor according to claim 1, it is characterised in that

By the way that the hole of the front end of web is fitted together to the sleeve of castor, and by the fixed position of the web using sleeve in The heart changes over arbitrary angle, so as to which the containing box of gearbox and motor is into desired relative to the configuration change of sleeve Position.

11. the electric brake structure of castor according to claim 10, it is characterised in that

By the way that the fixed position of web is changed centered on sleeve with 90 degree of intervals, so as to by gearbox and horse The containing box reached relative to the configuration of sleeve be fixed as sleeve all around in arbitrary desired position.